Coexistence of dx2−y2-wave superconductivity and antiferromagnetism induced by a staggered field

Yasuhiro Saiga; Masaki Oshikawa

doi:10.1103/PhysRevB.68.094511

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Coexistence of dx2−y2-wave superconductivity and antiferromagnetism induced by a staggered field

Yasuhiro Saiga, Masaki Oshikawa

DOI 10.1103/PhysRevB.68.094511 · Physical Review B

T1

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Abstract

The two-dimensional t−J model in a staggered field is studied by exact diagonalization of small clusters. For the low-hole-density region and a realistic value of J/t, it is found that the presence of a staggered field strengthens the attraction between two holes. With increasing field, the dx2−y2-wave superconducting correlations are enhanced while the extended-s-wave ones hardly change. This implies that coexistence of the dx2−y2-wave superconducting order and the commensurate antiferromagnetic order occurs in a staggered field.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Hg0.8Cu0.2Ba2Ca2Cu3O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown